CN210928624U - A biogas slurry filter irrigation device - Google Patents

Abstract

The utility model relates to the technical field of biogas slurry treatment, in particular to a biogas slurry filtration and irrigation device, comprising a biogas slurry pipeline, one end of which is connected to a biogas slurry tank, and the other end is connected to an irrigation pipeline. The biogas slurry pipeline is connected in series with Several filtering devices; one end of the clean water pipeline is connected with the clean water tank, and the other end is connected with the end of the biogas slurry pipeline and then connected to the irrigation pipeline; the first pumping device is connected in series with the upstream of the biogas slurry pipeline; the second pump The feeding device is connected in series with the upstream of the clean water pipeline; one end of the return pipeline is connected with the end of the biogas slurry pipeline, and the other end is connected with the clean water pipeline; the connection between the return pipeline and the biogas slurry pipeline is located in the filter Downstream of the device, the connection between the return pipeline and the clean water pipeline is located downstream of the second pumping device, and the return pipeline is provided with a first valve. The biogas slurry filtering irrigation device provided by the utility model has the advantages of simple structure, low cost and good filtering effect.

Description

A biogas slurry filter irrigation device

technical field

The utility model relates to the technical field of biogas slurry treatment, in particular to a biogas slurry filtration and irrigation device.

Background technique

With the large-scale development of domestic livestock and poultry breeding industry, the manure treatment of farms has become a concern of people. The construction of large and medium-sized biogas projects has found a powerful solution for the manure treatment of large-scale farms. It uses farm manure as fermentation raw material to obtain clean energy biogas, thereby improving the farm environment and reducing the pressure on the environment. However, at the same time, large and medium-sized biogas projects produce a large amount of anaerobic residue biogas slurry. If not fully and reasonably utilized, the biogas slurry will cause secondary pollution to the environment, thus restricting the development of large-scale aquaculture.

There are two main methods of processing biogas slurry: direct artificial irrigation and artificial wetland consumption. The two methods are easy to cause re-pollution. The use of precision irrigation technologies and equipment such as drip irrigation to irrigate biogas slurry is a natural resource for biogas slurry. effective ways and means of use. Biogas slurry contains a large amount of organic suspended solids and microorganisms, and algae and bacterial clusters are easy to multiply in the pipeline, which is easy to cause blockage of pipelines and irrigators. At present, the existing relevant filtration equipment in China cannot meet the requirements of biogas slurry irrigation projects, which also makes it difficult to popularize biogas slurry irrigation projects on a large scale.

In order to solve the problem of easy blockage of biogas slurry irrigation equipment, the Chinese utility model patent document with document number CN102527147A discloses a grading filtration and water-gas combined backwashing device for biogas slurry irrigation, including: grading trash tank, inlet water and inlet Four systems including liquid, laminated mesh filter group and combined water and gas backwash. The utility model combines a lamination filter and a mesh filter into a filter group, which is used as a dual filter device for biogas slurry, which can not only improve the filtering efficiency, but also facilitate the implementation of reverse flushing. The working efficiency of the device is improved, and it is not easy to be blocked.

However, the above technical solution still has shortcomings in practical use, which are as follows: in the above technical solution, in order to realize the cleaning of the filter device, an air compression pump is separately provided, and the irrigation water in the air combined pipeline is used to reverse the filter device. Flushing, the disadvantage of this is that the added air compression pump and its supporting pipeline will lead to a more complex structure of the irrigation equipment and a higher cost of use; at the same time, when using air to backflush the pipeline, because the air is in the pipeline The instability of the flow rate can easily cause the biogas slurry at the sewage outlet to splash and pollute the surrounding environment.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects that the biogas slurry filtration and irrigation device in the prior art will cause the structure to become complicated and the use cost to increase when backwashing, and further provide a simpler structure that can be used for Back-flushed biogas slurry filtration irrigation device.

For this reason, the technical scheme that the utility model provides is as follows:

A biogas slurry filtration irrigation device, comprising:

One end of the biogas slurry pipeline is connected with the biogas slurry tank, and the other end is connected with the irrigation pipeline, and several filter devices are connected in series on the biogas slurry pipeline;

One end of the clean water pipeline is connected with the clean water tank, and the other end is connected with the end of the biogas slurry pipeline and then connected with the irrigation pipeline;

The first pumping device, connected in series with the upstream of the biogas slurry pipeline, is suitable for pumping the biogas slurry from the biogas slurry tank to the biogas slurry pipeline;

The second pumping device, connected in series with the upstream of the clean water pipeline, is suitable for pumping clean water from the clean water tank to the clean water pipeline;

Also includes:

One end of the backflow pipeline is connected with the end of the biogas slurry pipeline, and the other end is connected with the clean water pipeline; the connection between the backflow pipeline and the biogas slurry pipeline is located downstream of the filtering device, and the backflow pipeline is connected to the clean water pipeline. The communication part of the clean water pipeline is located downstream of the second pumping device, and the return pipeline is provided with a first valve.

As a preferred technical solution, it also includes:

The second valve is arranged at the end of the biogas slurry pipeline, downstream of the connection between the biogas slurry pipeline and the return pipeline;

The third valve is arranged at the end of the clean water pipeline, downstream of the connection between the clean water pipeline and the return pipeline.

As a preferred technical solution, it also includes:

The mixing tank is arranged at the junction of the ends of the clean water pipeline and the biogas slurry pipeline, and is connected to the clean water pipeline, the biogas slurry pipeline and the irrigation pipeline.

As a preferred technical solution, the mixing tank is provided with an injection port.

As a preferred technical solution, the filtering device includes a volcanic rock filter, a quartz sand filter, a mesh filter, and a laminated filter that are connected in series from the digester to the irrigation pipeline.

As a preferred technical solution, the first pumping device is arranged between the biogas slurry tank and the volcanic rock filter, and is suitable for pumping the biogas slurry in the sedimentation tank to the biogas slurry pipeline.

As a preferred technical solution, a fourth valve is further arranged between the first pumping device and the volcanic rock filter, a first sewage outlet is arranged between the volcanic rock filter and the fourth valve, and the volcanic rock filter A second sewage outlet is arranged between the filter and the quartz sand filter, a third sewage outlet is arranged between the quartz sand filter and the mesh filter, and a third sewage outlet is arranged between the mesh filter and the laminated filter There is a fourth sewage outlet, and the first sewage outlet, the second sewage outlet, the third sewage outlet and the fourth sewage outlet are all provided with sewage valves.

As an alternative technical solution, a fourth valve is further provided between the first pumping device and the volcanic rock filter, and a first sewage outlet is provided between the volcanic rock filter and the fourth valve;

A second sewage outlet is arranged between the volcanic rock filter and the mesh filter, the second sewage outlet and the quartz sand filter are arranged in parallel on the biogas slurry pipeline, and the upstream and downstream of the second sewage outlet are respectively arranged There are fifth valve and sixth valve;

A third sewage outlet is arranged between the mesh filter and the laminated filter;

The first sewage outlet, the second sewage outlet and the third sewage outlet are all provided with sewage valves.

As a preferred technical solution, it also includes a sedimentation tank, the sedimentation tank is arranged upstream of the biogas slurry tank, and the sedimentation tank includes:

The sedimentation zone is vertically arranged in the sedimentation tank;

The filtration zone and the sedimentation zone are arranged vertically side by side in the sedimentation tank;

The filtration is communicated with the bottom of the settling zone.

As a preferred technical solution, the filtration area includes upper and lower sections, and the upper section and the lower section are communicated with each other through a filter plate.

As a preferred technical solution, the upper part of the upper filter area is provided with a straw filter layer.

As a preferred technical solution, the irrigation pipe is composed of a plurality of irrigation branch pipes in parallel, the ends of the irrigation branch pipes are installed with valves, and each irrigation branch pipe is provided with several irrigators.

The technical scheme provided by the utility model has the following technical effects:

1. The irrigation device provided by the present utility model includes: a biogas slurry pipeline, one end of which is communicated with the biogas slurry tank, and the other end is communicated with the irrigation pipeline, and several filter devices are connected in series on the biogas slurry pipeline; the clean water pipeline, One end is connected with the clean water tank, the other end is connected with the end of the biogas slurry pipeline and then connected with the irrigation pipeline; the first pumping device, connected in series with the upstream of the biogas slurry pipeline, is suitable for pumping the biogas slurry from the biogas slurry tank to the biogas slurry pipeline; the second pumping device, connected in series with the upstream of the clean water pipeline, is suitable for pumping clean water from the clean water tank to the clean water pipeline; one end of the return pipeline is connected to the end of the biogas slurry pipeline The other end is connected with the clean water pipeline; the connection between the backflow pipeline and the biogas slurry pipeline is located downstream of the filter device, and the connection between the backflow pipeline and the clean water pipeline is located at the bottom of the second pumping device. Downstream, a first valve is provided on the return line.

In the above structure, after the biogas slurry is filtered by the biogas slurry pipeline and several filtering devices, it enters the farmland through the irrigation pipeline, and is mixed and diluted with the clean water conveyed from the clean water pipeline before entering the farmland. When the filter device needs to be cleaned, open the first valve on the backflow pipeline, and clean water enters the end of the biogas slurry pipeline through the clean water pipeline and the backflow pipeline in turn, and then passes through the biogas slurry pipeline in reverse. Filter device, complete the clarity of the filter device. In the above process, there is no need to separately install power components such as air compressors, water pumps and other auxiliary branches for cleaning the filter device. Only one return flow line can be added to clean the filter device, which effectively reduces the The complexity of the equipment reduces the construction cost of the equipment.

2. The irrigation device provided by the present utility model further includes: a second valve, which is arranged at the end of the biogas slurry pipeline and is located downstream of the connection between the biogas slurry pipeline and the return pipeline; the third valve is arranged at the clean water pipe The end of the road is located downstream of the connection between the clean water pipeline and the return pipeline.

In the above structure, when the filter device needs to be cleaned, after closing the second gate and the third gate, all the pressure of the second pumping device can be conducted into the biogas slurry pipeline, and the cleaning pressure in the biogas slurry pipeline can be increased. Facilitates the removal of blockages.

3. The irrigation device provided by the utility model also includes a mixing tank, which is arranged at the confluence of the ends of the clean water pipeline and the biogas slurry pipeline, and communicates with the clean water pipeline, the biogas slurry pipeline and the irrigation pipeline. The existence of the mixing tank can increase the mixing area of clean water and biogas slurry, which is conducive to better dilution of biogas slurry, and is more conducive to crop absorption and utilization.

4. In the irrigation device provided by the present invention, the mixing tank is provided with a material injection port. The injection port can be used to inject chemical fertilizers or cleaning agents into the mixing tank, which is convenient to realize the integrated irrigation of biogas slurry, water and fertilizer, and also facilitates the cleaning of the irrigation pipeline.

5. In the irrigation device provided by the utility model, the filter device comprises a volcanic rock filter, a quartz sand filter, a mesh filter and a laminated filter which are connected in series from the biogas slurry tank to the irrigation pipeline. The particles that can be filtered out by volcanic rock filters, quartz sand filters, mesh filters, and laminated filters gradually decrease from large to small, and the biogas residue can be removed more effectively through such step-by-step filtration.

7. In the irrigation device provided by the present utility model, a fourth valve is also arranged between the first pumping device and the volcanic rock filter, and a first sewage outlet is arranged between the volcanic rock filter and the fourth valve, so the A second sewage outlet is arranged between the volcanic rock filter and the quartz sand filter, a third sewage outlet is arranged between the quartz sand filter and the mesh filter, and the mesh filter and the laminated filter A fourth sewage outlet is arranged between them, and sewage valves are all arranged at the first sewage outlet, the second sewage outlet, the third sewage outlet and the fourth sewage outlet.

In the above structure, after closing the fourth valve, opening the sewage valve upstream of the corresponding filter device can realize separate cleaning of the filter device, which is beneficial to improve the cleaning effect of a single filter device.

8. In the irrigation device provided by the present invention, a fourth valve is also arranged between the first pumping device and the volcanic rock filter, and a first sewage outlet is arranged between the volcanic rock filter and the fourth valve; A second sewage outlet is arranged between the volcanic rock filter and the mesh filter, the second sewage outlet and the quartz sand filter are arranged in parallel on the biogas slurry pipeline, and upstream and downstream of the second sewage outlet are respectively provided with The fifth valve and the sixth valve; a third sewage outlet is arranged between the mesh filter and the laminated filter; the first sewage outlet, the second sewage outlet and the third sewage outlet are all provided with sewage valve.

The above structure is an alternative to the arrangement of the sewage outlet, which can also achieve the purpose of individually cleaning the filter device, and is also beneficial to improve the cleaning effect of the single filter device.

9. The irrigation device provided by the present utility model also includes a sedimentation tank, including: a sedimentation area, which is vertically arranged in the sedimentation tank; a filtering area, which is vertically arranged side by side with the sedimentation area in the sedimentation tank; the filtering area is communicated with the sedimentation area. . Compared with the practice of setting the sedimentation tank as a single tank for sedimentation only, after the sedimentation tank is divided into a sedimentation area and a filtration area, it can have a preliminary filtering effect on the biogas slurry, reduce the working pressure of the downstream filter device, and improve the biogas slurry. filter effect.

11. In the irrigation device provided by the present invention, a straw filter layer is arranged upstream of the filter area. On the one hand, the straw filter layer has the advantage of being convenient to obtain materials. On the other hand, the straw filter layer can also be used as organic fertilizer after being dried and fermented after use, which has the effect of multi-purpose of one material.

To sum up, the biogas slurry filtration and irrigation device provided by the utility model has the advantages of simple structure, low cost and good filtering effect.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a specific embodiment of an irrigation device provided by the utility model;

2 is a schematic structural diagram of an alternative embodiment of the irrigation device shown in FIG. 1;

Fig. 3 is the plane structure schematic diagram of sedimentation tank in the irrigation device provided by the utility model;

Description of reference numbers:

1. Biogas slurry pipeline; 2. Biogas slurry tank; 3. Irrigation pipeline; 4. Sedimentation tank; 5. Clear water pipeline; 6. Clear water tank; 7. First pumping device; 8. Second pumping device ; 9. Backflow pipeline; 10. The first valve; 11. The second valve; 12. The third valve; 13. The mixing tank; 15. The volcanic rock filter; 16. The quartz sand filter; ; 18, laminated filter; 19, the fourth valve; 20, the first sewage outlet; 21, the second sewage outlet; 22, the third sewage outlet; 23, the fourth sewage outlet; 25, the fifth valve; 26 , the sixth valve; 27, sedimentation area; 28, filter area; 29, straw filter layer; 30, irrigation branch.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

The concept that needs to be explained in advance is that all the upstream and downstream mentioned in this embodiment are based on the flow direction of the biogas slurry from the sedimentation tank 4 to the irrigation pipeline 3. One side of road 3 is downstream.

Referring to FIG. 1 , it is a specific embodiment provided by the utility model. The embodiment is a biogas slurry filtration and irrigation device, which is used to filter the biogas slurry for irrigation. This embodiment includes: a biogas slurry pipeline 1, one end is connected to the biogas slurry tank 2, the other end is connected to the irrigation pipeline 3, the biogas slurry pipeline 1 is connected in series with several filtering devices; the clean water pipeline 5, one end is connected It is communicated with the clean water tank 6, and the other end is connected with the end of the biogas slurry pipeline 1 and then communicated with the irrigation pipeline 3; the first pumping device 7, connected in series with the upstream of the biogas slurry pipeline 1, is suitable for transferring the biogas slurry from the biogas slurry from the biogas slurry. The tank 2 is pumped to the biogas slurry pipeline 1; the second pumping device 8 is connected in series to the upstream of the clean water pipeline 5, and is suitable for pumping clean water from the clean water tank 6 to the clean water pipeline 5; the return pipe One end is connected with the end of the biogas slurry pipeline 1, and the other end is connected with the clean water pipeline 5; The connection between the pipeline 9 and the clean water pipeline 5 is located downstream of the second pumping device 8 , and a first valve 10 is provided on the return pipeline 9 .

In the above structure, after the biogas slurry is filtered by the biogas slurry pipeline 1 and several filtering devices, it enters the farmland through the irrigation pipeline 3, and is mixed and diluted with the clean water transported from the clean water pipeline 5 before entering the farmland. When the filter device needs to be cleaned, open the first valve 10 on the backflow pipeline 9, and clean water enters the end of the biogas slurry pipeline 1 through the clean water pipeline 5 and the backflow pipeline 9 in sequence, and then flows into the biogas slurry. Pipeline 1 passes through the filter device in reverse to complete the cleaning of the filter device. In the above process, it is not necessary to separately install power components such as air compressors, water pumps and other auxiliary branches for cleaning the filter device, and only add a return line 9 to clean the filter device, effectively reducing the The complexity of the equipment is reduced, and the construction cost of the equipment is reduced.

In order to increase the water pressure during reverse cleaning of the second pumping device 8 , it also includes: a second valve 11 , which is arranged at the end of the biogas slurry pipeline 1 and located downstream of the connection between the biogas slurry pipeline 1 and the return pipeline 9 . ; The third valve 12, arranged at the end of the clean water pipeline 5, is located at the downstream of the connection between the clean water pipeline 5 and the return pipeline 9. When the second valve 11 and the third valve 12 are closed, the water pressure applied by the second pumping device 8 to the return pipeline 9 can all reach the biogas slurry pipeline 1, and the irrigation pipeline 3 will not divert the fresh water. Water pressure to ensure the water pressure during cleaning.

In order to provide sufficient mixing area for clean water and biogas slurry, a mixing tank 13 is also included, which is arranged at the junction of the ends of the clean water pipeline 5 and the biogas slurry pipeline 1, and communicates with the clean water pipeline 5, the biogas slurry pipeline 1 and the irrigation pipeline. 3. The mixing tank 13 is provided with an injection port. The feeding port can be used to inject substances such as chemical fertilizer or cleaning agent into the mixing tank 13 , so as to facilitate the integrated irrigation of biogas slurry, water and fertilizer, and also facilitate the cleaning of the irrigation pipeline 3 .

The filtering device includes a volcanic rock filter 15, a quartz sand filter 16, a mesh filter 17, and a laminated filter 18, which are connected in series from the biogas slurry tank 2 to the irrigation pipeline 3. Both the volcanic rock filter 15 and the quartz sand filter 16 are in the shape of a tank, and both ends are respectively provided with a liquid inlet and a liquid outlet, and the interior is filled with volcanic rock and quartz sand respectively. The mesh filter 17 and the lamination filter 18 are the same as those generally available on the market. The first pumping device 7 is arranged between the biogas slurry tank 2 and the volcanic rock filter 15 , and is suitable for pumping the biogas slurry in the biogas slurry tank 2 to the biogas slurry pipeline 1 . The filter particles of the volcanic rock filter 15 , the quartz sand filter 16 , the mesh filter 17 , and the laminated filter 18 change from large to small, and the biogas residue can be removed more effectively through such step-by-step filtration.

A fourth valve 19 is further arranged between the first pumping device 7 and the volcanic rock filter 15 , and after the fourth valve 19 is closed, the first pumping device 7 is not impacted by the reverse flow.

As an embodiment of the above-mentioned sewage outlet arrangement, a fourth valve 19 is further arranged between the first pumping device 7 and the volcanic rock filter 15 , and a fourth valve 19 is arranged between the volcanic rock filter 15 and the fourth valve 19 . A sewage outlet 20; a second sewage outlet 21 is provided between the volcanic rock filter 15 and the mesh filter 17, and the second sewage outlet 21 and the quartz sand filter 16 are arranged in parallel on the biogas slurry pipeline 1, A fourth valve 19 and a fifth valve 25 are respectively arranged upstream and downstream of the second sewage outlet 21; a third sewage outlet 22 is arranged between the mesh filter 17 and the laminated filter 18; the The first sewage outlet 20 , the second sewage outlet 21 and the third sewage outlet 22 are all provided with sewage valves.

The above structure is a preferred embodiment of the arrangement of the sewage outlet, which can achieve the purpose of cleaning the filter device independently. Specifically, when the laminated filter 18 needs to be cleaned, the fourth valve 19, the fifth valve 25 and the sixth valve 26 are closed, the sewage valve on the third sewage outlet 22 is opened, and other sewage valves are closed; When the filter 17 is used, the fourth valve 19 and the fifth valve 25 are closed, the sewage valve and the sixth valve 26 on the second sewage outlet 21 are opened, and other sewage valves are closed; when the quartz sand filter 16 needs to be cleaned, the fourth valve is closed. Valve 19, sixth valve 26, open the fifth valve 25 and the sewage valve on the second sewage outlet 21, and close other sewage valves; when the volcanic rock filter 15 needs to be cleaned, close the fourth valve 19, the fifth valve 25 and the first The six valves 26 are opened, the sewage valve on the first sewage outlet 20 is opened, and the other sewage valves are closed.

As an alternative embodiment of the above-mentioned sewage outlet arrangement, referring to FIG. 2 , a first sewage outlet 20 is arranged between the volcanic rock filter 15 and the fourth valve 19 , the volcanic rock filter 15 and the quartz sand filter 16 A second sewage outlet 21 is arranged between the two filters, a third sewage outlet 22 is arranged between the quartz sand filter 16 and the mesh filter 17, and a filter is arranged between the mesh filter 17 and the laminated filter 18. The fourth sewage outlet 23, the first sewage outlet 20, the second sewage outlet 21, the third sewage outlet 22, and the fourth sewage outlet 23 are all provided with sewage valves. After closing the fourth valve 19, open the corresponding upstream filter device The sewage valve can realize the separate cleaning of the filter device, which is beneficial to improve the cleaning effect of a single filter device.

3 , the present embodiment also includes a sedimentation tank 4, the sedimentation tank 4 includes: a sedimentation area 27, which is vertically arranged in the sedimentation tank 4; a filter area 28, which is vertically arranged side by side with the sedimentation area 27 in the sedimentation tank 4 Inside; the filtration zone 28 and the precipitation zone 27 are communicated. Described filtration area 28 includes upper and lower sections, and the upper section filtration section 28 and the lower section filtration section 28 are communicated through filter plates. A straw filter layer 29 is provided upstream of the upper filter area 28 . Compared with the practice of setting the sedimentation tank 4 as a single pond only for sedimentation, after the sedimentation tank 4 is divided into a sedimentation area 27 and a filtering area 28, it can have a preliminary filtering effect on the biogas slurry and reduce the working pressure of the downstream filter device. , to improve the filtration effect of biogas slurry. On the one hand, the straw filter layer 29 has the advantage of being convenient to obtain materials. On the other hand, the straw filter layer 29 can also be used as organic fertilizer after being dried and fermented after use, which has the effect of multi-purpose of one material.

The action process of the above irrigation device is as follows:

When irrigation is required, the second valve 11, the third valve 12 and the fourth valve 19 are opened, and the remaining valves, the sewage valve and the valve at the end of each irrigation branch pipe 30 are closed; The biogas slurry pipeline 1 passes through the volcanic stone filter, the quartz sand filter 16, the mesh filter 17 and the laminated filter 18 in sequence, and then enters the mixing tank 13 after passing through the second valve 11; the clean water in the clean water tank 6, After the clean water pipeline 5 passes through the mesh filter 17 and the laminated filter 18 in sequence, it enters the mixing tank 13 through the third valve 12; after being filtered in the mixing tank 13, the biogas slurry is mixed with clean water and fertilizer and then enters the irrigation pipe Road 3, the liquid is discharged through the irrigation device on the irrigation branch pipe 30.

When cleaning the irrigation pipeline 3, close the second valve 11 and the first valve 10, open the third valve 12 and the valve at the end of each irrigation branch pipe 30, and the water in the clean water pool 6 is pumped into the clean water pipeline 5 through the water pump. The mesh filter 17 , the laminated filter 18 and the third valve 12 enter the mixing tank 13 for mixing with the cleaning agent, enter the irrigation pipeline 3 for cleaning, and then discharge through the valve at the end of each irrigation branch pipe 30 .

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (12)

1. A biogas slurry filtering irrigation device comprising:

one end of the biogas slurry pipeline is communicated with the biogas slurry pool, the other end of the biogas slurry pipeline is communicated with the irrigation pipeline, and a plurality of filtering devices are connected in series on the biogas slurry pipeline;

one end of the clean water pipeline is communicated with the clean water tank, and the other end of the clean water pipeline is communicated with the irrigation pipeline after being converged with the tail end of the biogas slurry pipeline;

the first pumping device is connected in series with the upstream of the biogas slurry pipeline and is suitable for pumping biogas slurry from the biogas slurry pool to the biogas slurry pipeline;

the second pumping device is connected in series with the upstream of the clean water pipeline and is suitable for pumping the clean water from the clean water tank to the clean water pipeline;

it is characterized by also comprising:

one end of the backflow pipeline is communicated with the tail end of the biogas slurry pipeline, and the other end of the backflow pipeline is communicated with the clean water pipeline; the connecting part of the backflow pipeline and the biogas slurry pipeline is positioned at the downstream of the filtering device, the connecting part of the backflow pipeline and the clean water pipeline is positioned at the downstream of the second pumping device, and the backflow pipeline is provided with a first valve.

2. The biogas slurry filtering irrigation device according to claim 1, further comprising:

the second valve is arranged at the tail end of the biogas slurry pipeline and is positioned at the downstream of the communication part of the biogas slurry pipeline and the backflow pipeline;

and the third valve is arranged at the tail end of the clean water pipeline and is positioned at the downstream of the communication part of the clean water pipeline and the backflow pipeline.

3. The biogas slurry filtering irrigation device according to claim 1, further comprising:

the blending tank is arranged at the junction of the clean water pipeline and the biogas slurry pipeline and communicated with the clean water pipeline, the biogas slurry pipeline and the irrigation pipeline.

4. The biogas slurry filtering irrigation device as claimed in claim 3, wherein the mixing tank is provided with an injection port.

5. The biogas slurry filtering irrigation device according to claim 1, wherein the filtering device comprises a volcanic rock filter, a quartz sand filter, a mesh filter and a laminated filter which are connected in series from a biogas slurry pool to an irrigation pipeline.

6. The biogas slurry filtering irrigation device as claimed in claim 5, wherein the first pumping device is arranged between the biogas slurry tank and the volcanic rock filter and is adapted to pump biogas slurry in the biogas slurry tank into the biogas slurry pipeline.

7. The biogas slurry filtering irrigation device according to claim 6, wherein a fourth valve is further arranged between the first pumping device and the volcanic filter, a first sewage discharge port is arranged between the volcanic filter and the fourth valve, a second sewage discharge port is arranged between the volcanic filter and the quartz sand filter, a third sewage discharge port is arranged between the quartz sand filter and the mesh filter, a fourth sewage discharge port is arranged between the mesh filter and the laminated filter, and sewage discharge valves are arranged at the first sewage discharge port, the second sewage discharge port, the third sewage discharge port and the fourth sewage discharge port.

8. The biogas slurry filtering irrigation device according to claim 6, wherein a fourth valve is arranged between the first pumping device and the volcanic rock filter, and a first drain outlet is arranged between the volcanic rock filter and the fourth valve;

a second sewage draining outlet is formed between the volcanic rock filter and the net type filter, the second sewage draining outlet and the quartz sand filter are connected in parallel on the biogas pipeline, and a fifth valve and a sixth valve are respectively arranged at the upstream and the downstream of the second sewage draining outlet;

a third sewage draining outlet is arranged between the mesh filter and the laminated filter;

and the first sewage draining port, the second sewage draining port and the third sewage draining port are all provided with sewage draining valves.

9. The biogas slurry filtering irrigation device according to claim 5, further comprising a sedimentation tank disposed upstream of the biogas slurry tank, the sedimentation tank comprising:

the sedimentation area is vertically arranged in the sedimentation tank;

the filtering area and the settling area are vertically arranged in the settling tank side by side;

the filtering area is communicated with the settling area.

10. The biogas slurry filtering irrigation device as claimed in claim 9, wherein the filtering area comprises an upper filtering area and a lower filtering area, and the upper filtering area and the lower filtering area are communicated through a filter plate.

11. The biogas slurry filtering irrigation device as recited in claim 10, wherein a straw filtering layer is disposed upstream of the upper filtering area.

12. The biogas slurry filtering irrigation device according to any one of claims 1 to 11, wherein the irrigation pipeline is composed of a plurality of irrigation branch pipes connected in parallel, valves are installed at the tail ends of the irrigation branch pipes, and each irrigation branch pipe is provided with a plurality of emitters.

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